Add 12/14 and 3/21
12/14 + 3/21 is 1/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 14 × 3 = 42,
12/14 = 12 × 3/14 × 3 = 36/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
3/21 = 3 × 2/21 × 2 = 6/42 - Add the two like fractions:
36/42 + 6/42 = 36 + 6/42 = 42/42 - 42/42 simplified gives 1/1
- So, 12/14 + 3/21 = 1/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/14+3/21 12/14+6/21 12/28+3/21 12/14+3/42 36/14+3/21 12/14+9/21 12/42+3/21 12/14+3/63 60/14+3/21 12/14+15/21 12/70+3/21 84/14+3/21 12/98+3/21